THE INTERACTION BETWEEN QUANTITATIVE MICROBIAL RISK ASSESSMENT AND RISK MANAGEMENT IN THE WATER SAFETY PLAN

This document describes how Quantitative Microbial Risk Assessment (QMRA) can be used in the Water Safety Plan. It highlights what QMRA is and how QMRA can provide important information to guide the HACCP-based risk management process. Every water supplier who is preparing a Water Safety Plan is faced with the basic question: "Is my system safe (enough)?". QMRA can provide the answer in a manner that is science-based and transparent. QMRA is also tool to prioritise risks in a science-based, objective manner, to set performance targets for operations and design monitoring programs that are adequate for demonstrating that the water supply system meets the health targets.